CHAPTER XXXVII. 



SPORADIC DISEASE ^—continued. 



DIETETIC DISEASES— con^wzwed 



DIABETES INSIPIDUS, POLYUPJA, HYDEURIA— 

 AZOTUEIA— OXALUEIA— EED WATEE— ASTHMA, 

 BEOKEN WIND, &c. 



DIABETES INSIPIDUS, TOLYUKIA, HYDRURIA. 



A DISEASE characterised by great thirst, excessive discharge of 

 urine, rapid emaciation, languor, and debility. In the majority 

 of instances it is caused by deteriorated food, but in some cases 

 it seems to be due to some constitutional cause, produced 

 through derangement of the assimilative functions, either in 

 the digestive canal, the solid organs, or the blood. When 

 induced by no traceable cause, and where change of diet has 

 no effect in checking it, the disease is generally premonitory to 

 farcy or glanders, and is symptomatic of a breaking up of the 

 tissues of the body. 



Etiology. — Diabetes is induced by two kinds of causes, namely, 

 intrinsic and extrinsic. The intrinsic causes are those originat- 

 ing in defective assimilation, or rapid tissue metamorphosis, owing 

 to the actual presence of the glanders poison, or to a condition 

 of the system tending to its development ; the polyuria being 

 induced by the action upon the kidneys of those constituents, 

 products of tissue change, winch are naturally eliminated by 

 them. In some instances diabetes results from indigestion, 

 disappearing when the digestive apparatus is restored to its 

 normal condition. It also accompanies other diseases where the 

 digestive process is defective. 



The extrinsic causes are to be found in the food wliicli the 

 animal consumes ; I am not aware that it is ever induced by the 

 water it drinks. Dark-coloured, highly-heated hay generally 



